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1Bằng Cornwell, BenjaminAvailable for University of the Philippines System via Cambridge Books Online. Click here to access
Được phát hành 2015
Electronic Resource -
2Bằng Joas, Hans 1948-Available for University of the Philippines System via Cambridge Books Online. Click here to access
Được phát hành 2009
Electronic Resource -
3Bằng Mouzelis, Nicos P.Available for University of the Philippines System via Cambridge Books Online. Click here to access
Được phát hành 2008
Electronic Resource